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Analog Devices Inc./Maxim Integrated MAX1111CPE+
- Part No.:
- MAX1111CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1111CPE+.pdf
- Description:
- IC ADC 8BIT SAR 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,599
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Product details
Overview
The MAX1111CPE+ from Maxim Integrated is a low-power, 8-bit, 4-channel analog-to-digital converter (ADC) with internal track/hold, 2.048V reference, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single 2.7V–5.5V supply, draws only 85µA at 50ksps, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and targets portable data logging and hand-held measurement devices.
For engineers reviewing the MAX1111CPE+ datasheet, MAX1111CPE+ pinout, MAX1111CPE+ application, or MAX1111CPE+ equivalent, this page delivers verified electrical specs, functional pin roles, real-world use cases in solar-powered remote systems and medical instruments, and validated alternative parts for design continuity.
Technical Context
The MAX1111CPE+ uses successive-approximation architecture with an integrated track/hold circuit and supports both internal (400kHz typical) and external clock modes (up to 2MHz). Its analog input multiplexer enables 4 single-ended or 2 differential channels, with configurable common-mode reference via COM pin.
Conversion control is managed through an 8-bit software-programmable control byte that sets channel selection, polarity, input mode, and power-down state. The device features a serial-strobe output (SSTRB) for interrupt-driven timing and automatic wake-up on serial interface access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit SAR ADC with no missing codes over temperature |
| Sampling Rate | Up to 50ksps with internal clock; conversion time 25µs (typ) in internal mode |
| Supply Current | 85µA at 50ksps; drops to 6µA in software power-down at 1ksps |
| Reference Voltage | Internal 2.048V ±0.3%, or external 1V to VDD; REFOUT tempco ±50ppm/°C |
| Input Configuration | 4 single-ended or 2 pseudo-differential channels; COM pin sets zero-code reference |
| Accuracy | Total unadjusted error ≤±1 LSB max; INL ≤±0.5 LSB, DNL ≤±0.3 LSB |
| Serial Interface | 4-wire SPI/QSPI/MICROWIRE-compatible; MSB-first, SCLK falling-edge DOUT |
Pinout & Package
The MAX1111CPE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), rated for 0°C to +70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input Channels | Four selectable single-ended inputs; pairs (CH0/CH1, CH2/CH3) support pseudo-differential mode |
| COM | Analog Common Reference | Sets zero-code voltage in single-ended mode; must be stable to ±0.5 LSB |
| REFIN | Reference Input | Accepts internal REFOUT (2.048V) or external 1V–VDD reference |
| REFOUT | Internal Reference Output | 2.048V ±0.3% source requiring 1µF bypass to AGND |
| AGND / DGND | Analog & Digital Grounds | Separate ground pins minimize noise coupling; AGND–DGND offset ≤±0.3V |
| CS | Active-Low Chip Select | Enables serial interface; DOUT and SSTRB high-impedance when CS = high |
| SCLK | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; accepts up to 5.5V logic |
| DIN | Serial Data Input | Receives 8-bit control byte; first '1' bit defines MSB; accepts up to 5.5V logic |
| DOUT | Serial Data Output | Outputs 8-bit conversion result MSB-first on SCLK falling edge |
| SSTRB | Serial Strobe Output | Signals end-of-conversion: pulses high (2 cycles) in external mode; low→high in internal mode |
| SHDN | Three-Level Shutdown | High-impedance = active; low = 10µA shutdown; high = disables internal reference |
| VDD | Positive Supply | 2.7V–5.5V single supply; powers analog and digital sections |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Operation | 85µA at full 50ksps rate; 6µA in software power-down at 1ksps - extends battery life in portable systems |
| Flexible Input Architecture | Software-selectable unipolar/bipolar and single-ended/differential modes enable reuse across sensor types without hardware change |
| Integrated Reference & Track/Hold | Eliminates need for external precision reference and external sample-hold circuitry - reduces BOM count and layout area |
| Robust Serial Interface | 5.5V-tolerant DIN/SCLK/CS pins allow direct interfacing with 3V or 5V microcontrollers without level shifters |
| Interrupt-Ready Timing Signal | SSTRB provides precise end-of-conversion strobe for efficient interrupt-driven firmware - avoids polling overhead |
Applications
| Portable Data Logging | Hand-Held Measurement Devices |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and light levels every 10 seconds. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs; internal reference ensures consistent scaling across varying battery voltage. Use Value: 85µA operating current and 6µA shutdown extend 2xAA battery life beyond 1 year; 4-channel capability supports multi-sensor integration. | Use Scenario: Pocket-sized multimeter acquiring voltage, current, and resistance readings with auto-ranging. IC Role / Device Role / Timing Role: Configurable input modes allow shared analog front-end for different measurement types; SSTRB synchronizes display update. Use Value: Software-selectable bipolar/unipolar and differential/single-ended operation eliminates manual range switching and improves accuracy at low signal levels. |
| Medical Instruments | Solar-Powered Remote Systems |
Use Scenario: Portable ECG monitor capturing lead-II signals with baseline drift compensation. IC Role / Device Role / Timing Role: Pseudo-differential input rejects common-mode noise from body coupling; COM pin referenced to mid-supply for bipolar operation. Use Value: ±1 LSB total unadjusted error and 49dB SINAD meet Class II medical device linearity requirements; low power enables continuous monitoring. | Use Scenario: Off-grid weather station powered by 3W solar panel and LiFePO₄ battery, transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Digitizes solar irradiance, battery voltage, and ambient temperature; wakes from 6µA shutdown on timer interrupt. Use Value: Internal 2.048V reference maintains measurement stability across wide temperature (-20°C to +60°C); QSOP package suits compact PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 4-channel, SPI interface; 2.7V–5.25V supply; no internal reference - requires external 2.5V ref | Lacks integrated reference and track/hold; higher system-level component count | Select when external reference already exists and board space permits discrete T/H |
| MCP3204-I/P | 12-bit resolution, 4-channel, SPI; 2.7V–5.5V; internal 4.096V reference; 1µA standby current | Higher resolution but slower max rate (100ksps vs 50ksps); larger 14-pin PDIP package | Choose for improved dynamic range where 12-bit precision outweighs power and size trade-offs |
Compared with ADS7822U and MCP3204-I/P, the MAX1111CPE+ uniquely combines integrated 2.048V reference, track/hold, and ultra-low 6µA shutdown current in a compact QSOP - optimizing for minimal BOM, battery runtime, and PCB area in portable instrumentation.
Availability
MAX1111CPE+ is available at Aetrix Electronics and suitable for portable data logging, hand-held measurement devices, and solar-powered remote systems requiring stable component supply and long-term industrial availability.
Supply support for MAX1111CPE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1111CPE+ belongs to Maxim's low-power serial ADC product line, engineered for battery-operated instrumentation where integration, accuracy, and micropower consumption are critical.
FAQ
What is the maximum sampling rate of the MAX1111CPE+?
The MAX1111CPE+ achieves up to 50ksps using its internal clock. In external clock mode, the sampling rate is determined by the SCLK frequency and control byte setup - with 10 clock cycles per conversion, a 5MHz SCLK yields 500ksps theoretical, but the device's analog bandwidth and acquisition time limit practical sustained rate to 50ksps for full accuracy. The MAX1111CPE+ datasheet specifies 50ksps as the maximum guaranteed rate with ≤±1 LSB total unadjusted error.
Does the MAX1111CPE+ require an external reference voltage?
No, the MAX1111CPE+ does not require an external reference voltage. It includes an internal 2.048V ±0.3% reference accessible at the REFOUT pin, which can be used directly by connecting REFIN to REFOUT. An external reference between 1V and VDD may be applied to REFIN if tighter tolerance or different voltage is needed - but the internal reference eliminates BOM cost and layout complexity in most portable applications using the MAX1111CPE+.
How many analog input channels does the MAX1111CPE+ support?
The MAX1111CPE+ supports four analog input channels (CH0–CH3). These can be configured in single-ended mode (four independent inputs referenced to COM) or pseudo-differential mode (two differential pairs: CH0/CH1 and CH2/CH3). Unlike the MAX1110, the MAX1111CPE+ does not support CH4–CH7 - its channel count and pinout are fixed to the 16-pin QSOP package, as confirmed in the functional diagram and pin description tables of the official MAX1111 datasheet.
What is the function of the SHDN pin on the MAX1111CPE+?
The SHDN pin on the MAX1111CPE+ is a three-level shutdown input. When left open (high-impedance), the MAX1111CPE+ operates normally. Pulling SHDN low reduces supply current to ≤10µA, placing the device in hardware shutdown. Pulling SHDN high disables the internal reference while keeping digital circuitry active - useful for systems using an external reference. This flexibility allows precise power-state control beyond software-only power-down, enhancing system-level energy management for the MAX1111CPE+.
Is the MAX1111CPE+ compatible with standard SPI interfaces?
Yes, the MAX1111CPE+ is fully compatible with standard SPI interfaces when configured with CPOL = 0 and CPHA = 0. Its 4-wire serial interface (CS, SCLK, DIN, DOUT) matches SPI, QSPI, and MICROWIRE protocols. The MAX1111CPE+ clocks data in on SCLK rising edge and out on falling edge, supports MSB-first transmission, and tri-states DOUT/SSTRB when CS is high - enabling plug-and-play integration with common microcontrollers without custom driver development for the MAX1111CPE+.
MAX1111CPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1111CPE+ FAQ
1.How can I place an order for MAX1111CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1111CPE+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1111CPE+ reliable?
The price and inventory of MAX1111CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1111CPE+ is usually 5 days.
3.What payment methods are accepted for MAX1111CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1111CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1111CPE+?
MAX1111CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1111CPE+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1111CPE+?
For technical support, including MAX1111CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1111CPE+ requirements.
6.How does Aetrix verify that MAX1111CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX1111CPE+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1111CPE+ meets industry standards.
7.What is the process for return or replacement of MAX1111CPE+?
All MAX1111CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1111CPE+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1111CPE+ part is unused and in its original packaging.
Return procedure for MAX1111CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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